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Assessing the Contribution of the Oscillatory Potentials to the Genesis of the Photopic ERG with the Discrete Wavelet Transform
Joint Authors
Gauvin, Mathieu
Lina, Jean-Marc
Dorfman, Allison L.
Trang, Nataly
Gauthier, Mercedes
Little, John M.
Lachapelle, Pierre
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-12-22
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The electroretinogram (ERG) is composed of slow (i.e., a-, b-waves) and fast (i.e., oscillatory potentials: OPs) components.
OPs have been shown to be preferably affected in some diseases (such as diabetic retinopathy), while the a- and b-waves remain relatively intact.
The purpose of this study was to determine the contribution of OPs to the building of the ERG and to examine whether a signal mostly composed of OPs could also exist.
DWT analyses were performed on photopic ERGs (flash intensities: −2.23 to 2.64 log cd·s·m−2 in 21 steps) obtained from normal subjects ( n = 40 ) and patients ( n = 21 ) affected with a retinopathy.
In controls, the %OP value (i.e., OPs energy/ERG energy) is stimulus- and amplitude-independent (range: 56.6–61.6%; CV = 6.3%).
In contrast, the %OPs measured from the ERGs of our patients varied significantly more (range: 35.4%–89.2%; p < 0.05 ) depending on the pathology, some presenting with ERGs that are almost solely composed of OPs.
In conclusion, patients may present with a wide range of %OP values.
Findings herein also support the hypothesis that, in certain conditions, the photopic ERG can be mostly composed of high-frequency components.
American Psychological Association (APA)
Gauvin, Mathieu& Dorfman, Allison L.& Trang, Nataly& Gauthier, Mercedes& Little, John M.& Lina, Jean-Marc…[et al.]. 2016. Assessing the Contribution of the Oscillatory Potentials to the Genesis of the Photopic ERG with the Discrete Wavelet Transform. BioMed Research International،Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1097155
Modern Language Association (MLA)
Gauvin, Mathieu…[et al.]. Assessing the Contribution of the Oscillatory Potentials to the Genesis of the Photopic ERG with the Discrete Wavelet Transform. BioMed Research International No. 2016 (2016), pp.1-12.
https://search.emarefa.net/detail/BIM-1097155
American Medical Association (AMA)
Gauvin, Mathieu& Dorfman, Allison L.& Trang, Nataly& Gauthier, Mercedes& Little, John M.& Lina, Jean-Marc…[et al.]. Assessing the Contribution of the Oscillatory Potentials to the Genesis of the Photopic ERG with the Discrete Wavelet Transform. BioMed Research International. 2016. Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1097155
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1097155